EP3226237A2 - Ultrasound exposure device - Google Patents

Abstract

The present invention relates to a sound system having a sound generator which has a main emission direction, and a horn in the form of a hollow body which widens in a funnel shape from a sound inlet opening to a sound outlet opening and which has at least a first planar side surface extending between the openings Sounder is arranged at or near the sound inlet opening. To at least reduce surface reflections and to provide a sound system with a well-aligned and well-defined sound wave front with a high sound pressure level and a balanced frequency response, the invention proposes that the sound generator is arranged immediately adjacent to the (first) flat side surface or an imaginary extension thereof in the manner in that its main emission direction runs parallel to the (first) planar side surface from the sound inlet to the sound exit opening.

Description

The present invention relates to a sound system having a sound generator which has a main emission direction, and a horn in the form of a hollow body which widens in a funnel shape from a sound inlet opening to a sound outlet opening and which has at least a first planar side surface extending between the openings Sounder is arranged at or near the sound inlet opening.

Such sonicators are used to voice alarm people in areas with loud ambient noise. In tunnels, but also in other open and closed spaces, such as train stations, airports, factory buildings and shipyards, situations may arise in which persons must be informed about dangers and must be led out of the danger zones by means of voice instructions. Information, voice announcements or voice instructions can be transmitted via sound equipment arranged on the walls and especially on the ceilings of the rooms. The loud noise levels usually associated with the hazardous situations caused by, for example, fire, running machinery or engines or screaming people, must be drowned out by the sound system so that the possibly life-saving instructions can be perceived by the people to be evacuated acoustically understandable.

Due to spatial conditions, the operation of such public address systems often leads to the formation of destructive interferences which lead to a reduction in the range of the acoustic signal and to a reduction of the signal quality. If the acoustic signal emitted by the sounding device strikes an interface, such as a tunnel wall and / or ceiling, a part of the sound occurring on the interface is reflected. A person located at a distance from the interface and the sound system perceives both the sound signal emitted directly by the sound generator and the sound signal reflected by the wall or ceiling. However, the skew between the immediately received and the reflected signal results in partially destructive overlays and distortions.

In contrast, it is an object of the present invention to provide a sounding device that at least reduces interfacial reflections, a well-aligned and has a well-defined sound wave front with a high sound pressure level and a balanced frequency response. In addition, the device should be simple and inexpensive to produce and versatile.

According to the invention, a sound system with a sound generator is proposed which has a main emission direction, with a horn in the form of a funnel-shaped widening from a sound inlet opening to a sound outlet opening hollow body having at least a first extending between the openings, flat side surface, wherein the sound generator or near the sound inlet opening, and wherein the sound generator is arranged immediately adjacent to the (first) planar side surface or an imaginary extension thereof in such a way that its main radiation direction is parallel to the (first) planar side surface from the sound inlet to the sound exit opening ,

The main radiation direction of a sound generator is defined by the direction of the respective maximum sound level of the free sounder or the sound-generating element thereof (which is, for example, a vibrating diaphragm) at an arbitrary distance (within a predetermined range). This definition of the main emission direction is intended to preclude reflection and change in direction of the sound waves emanating from the sound-generating element in front of or in the region of the sound inlet opening

The sounder converts an electrical signal into an acoustic signal. Preferably, the acoustic signal has a frequency range of 20 Hz to 20 kHz. The generated acoustic signal passes through the sound inlet opening in the horn of the sound system. Due to the arrangement of the sounder at or near the sound inlet opening occur almost no interactions between the acoustic signal and the sound inlet opening. The acoustic signal is passed almost lossless in the horn of the sound system.

As the "sound inlet opening" of the smallest free cross-section of the horn is considered perpendicular to the emission direction and in the main emission behind the sounder. For the purposes of the present invention, the sounder "on" or "near the sound inlet opening" is arranged when the sounder is disposed directly in the sound inlet opening adjoins this or at a distance along the Hauptabstrahlrichtung having the order of the maximum diameter of the Sound inlet is or is smaller. The arrangement of the sound generator at or near the sound inlet orifice pursues the purpose of introducing the acoustic signal through the sound inlet into the horn and through it with virtually no loss, without intermediate deflection or backscattering of the sound waves emanating from the actual sound source (eg vibrating membrane) , The distance of the sounder to the sound inlet opening should not exceed a value of 50 mm and preferably 1 mm or less.

The horn-introduced acoustic signal propagates in the funnel-shaped horn in the form of sound waves. Because the sound generator is disposed immediately adjacent to the flat side surface and the main radiation direction of the sounder is parallel to the flat side surface from the sound entrance opening to the sound exit opening, the maximum (the maximum amplitude) of the wavefront propagates parallel to this flat side surface. This side surface may for example be mounted parallel to a wall or ceiling of a building. As a result, runtime differences between the direct wavefront and reflections with the flat side surface and / or the wall are largely avoided or restricted to very small angles. The generated sound pressure in the direction of radiation is not weakened by the flat side surface of the horn and corresponding walls or ceilings but by reflections at a very small angle, which cause no noticeable transit time differences, rather amplified, so that the acoustic signal is good and undistorted perceptible even at a great distance.

For the purposes of the present invention, "immediately adjacent to the flat side surface or an imaginary extension thereof" is understood to mean that the sound generator is arranged as close as possible to the flat side surface.

Preferably, the sounder touches the flat side surface or its imaginary extension. A clear distance of up to 4 cm, preferably of at most 2 cm, between the sound generator and the flat side surface or its extension is understood, for example, as "immediately adjacent to the flat side surface or an imaginary extension thereof".

For example, the sound generator has a membrane whose main vibration direction corresponds to the main emission direction. The projection surface of the membrane measured perpendicularly to the main emission direction should then largely (more than 50%), preferably completely cover the cross-section of the sound entry opening. If the surface of the membrane projected in a plane perpendicular to the main emission direction is smaller than the cross section of the sound inlet opening, the surface of the membrane projected into the cross section of the sound inlet opening should adjoin the plane defined by the flat side surface of the horn or have at most a clear distance to this plane , which is less than half the maximum diameter of the projection surface of the membrane. The projection surface of such a vibrating membrane on the sound inlet opening may also be larger than the surface of the sound inlet opening, but should not be more than twice.

In one embodiment, the sound inlet opening is circular, wherein preferably the edge of the sound inlet opening, the flat side surface or an imaginary extension of the flat side surface tangent.

The sound generator preferably has a circular or rotationally symmetrical membrane as a sound-generating element. The projected along the main emission in a plane perpendicular to this plane of the membrane is then in the sound inlet opening 5, or covers it. In general, the symmetry axis of the membrane and the main emission direction then also coincide.

In one embodiment, the opening cross section of the sound outlet opening and the opening cross section of the sound inlet opening, in each case perpendicular to the main emission, a ratio between 10: 1 and 500: 1, preferably between 50: 1 and 200: 1, particularly preferably 180: 1.

In one embodiment, the free (inner) cross section of the horn is rectangular, with the inner corners preferably having a radius of curvature of a few millimeters. The horn may have in its initial section, starting from the sound inlet opening of the shape of the sounder or its membrane adapted cross-section, so for example a circular cross-section, which then gradually, for example, within the first tenth of the horn length, merges into a rectangular cross-section. In this initial region, the above-defined flat surface of the horn would not be exactly flat, but would be a tangent to the cross section of the horn in this plane.

In one embodiment, at least one second side surface of the horn connecting the sound inlet opening and the sound outlet opening is arranged opposite to the first planar side surface which is not flat, but for example curved concavely outwards from the sound inlet opening to the sound outlet opening so that the free cross section of the horn progressively increases in the direction of the sound outlet opening. The axis of curvature lies parallel to the first plane and perpendicular to the main emission direction. The average radius of curvature is on the order of 1 to 3 times the length of the horn, i. H. the distance between sound inlet and sound outlet. Preferably, the profile of the concave side surface is approximated to a hyperbolic function curve or can be described by a hyperbolic function.

The dimensions of a horn of concrete embodiments are at a length of about 70 cm to 200 cm and a sound outlet opening of about 40 cm to 100 cm wide and a height of 20 cm to about 50 cm. The remaining dimensions result from the relative ratios given as preferred.

The remaining side surfaces defining the rectangular cross-section of the horn may in turn be planar surfaces diverging from each other at a divergence angle of up to 60 °, preferably 40 ° to 50 °, whose planes are preferably perpendicular to the plane of the first side surface and enclose with the main emission in about half the divergence angle of the two side surfaces.

The distance between the sound inlet opening and the sound outlet opening along the flat side surface of the funnel-shaped hollow body corresponds in one embodiment to 20 times to 200 times the maximum diameter of the sound inlet opening, preferably 20 times to 50 times the maximum diameter of the sound inlet opening. This ratio is of importance for a range of the sound system that is as large as possible in relation to the maximum sound radiation of the sound generator.

In one embodiment, in the free cross section of the funnel-shaped hollow body at a distance from the sound outlet opening, a grid or a perforated plate is arranged, wherein the grid or the perforated plate preferably has an inclination angle between 60 ° and 70 °, preferably 65 °, with respect to the main emission. Preferably, the distance of the grid or the perforated plate from the sound outlet opening is a maximum of 1/3, for example between 1/4 and 1/8 of the distance between the sound inlet and outlet opening.

In the first place, the grid or the perforated plate should prevent nesting of animals in the horn and clogging of the horn by debris, at the same time the grid or perforated plate should affect the emission characteristics of the horn as little as possible. The inventive design and arrangement of the grid or perforated plate has a low harmonic distortion and does not affect the sound quality of the sound system or only slightly.

Preferably, the grid or the perforated plate is arranged in a grid receiving area, wherein the grid or perforated plate is fixed with a plurality of countersunk screws in the grid receptacle. Preferably, the recesses of the grid or the holes of the perforated plate are arranged such that the distance between the centers of adjacent recesses or holes of the grid or of the perforated plate is the same. For example, the hole pattern may form a hexagonal pattern of equilateral triangles, and the maximum hole diameter may be, for example, 1 mm to 20 mm, preferably 3 mm.

In one embodiment, a fabric, preferably a non-woven, is arranged between the grid and the sound inlet opening. The fabric or fleece protects the sounder during cleaning work on the horn and prevents ingress of water. In one embodiment, the fabric, preferably the nonwoven, is arranged on the side of the grating facing the sound inlet opening.

In one embodiment, the outer edges of the grid or perforated plate have an edge protection seal in their connection to the horn. The edge protection seal reduces the distortion factor and prevents the ingress of dirt.

In one embodiment, the sound outlet opening has a circumferential edge reinforcement. The circumferential edge reinforcement, preferably in the form of a stiffening bead, contributes to the stiffening of the horn. During operation of the acoustic irradiation device, the edge reinforcement contributes to the fact that the horn is not or only insignificantly deformed by the sound transmitted through it, and natural resonances of the horn are minimized.

In one embodiment, the sound generator is arranged in a housing which is open on one side, wherein the housing is preferably watertight and / or dust-tight. A preferably waterproof and / or dustproof housing protects the sound generator disposed in the housing from environmental influences and thus increases the life of the sounder. The open side of the housing releases the sound source, such as a membrane, which may still be protected by a soundproofing grid or mesh or fabric.

The sound inlet opening having the end of the horn has, for example, a circumferential flange which surrounds or defines the inlet opening and can serve as a mounting flange for a sounder housing. The flange may, for example, be made in one piece with the horn. Alternatively, the horn and the flange may be composed of several parts.

In order to simplify the installation of the sound system and / or to allow mounting in different circumstances at the installation site and to align the sound system in the assembled state, is provided in one embodiment that a mounting bracket with the funnel-shaped hollow body releasably and adjustably connected is, wherein the mounting bracket is designed so that it is the flat side surface of the horn in a small clearance of the side surface to the mounting wall, for example, between 1 cm and 10 cm, preferably about 1 cm to 7 cm, to a mounting surface and parallel to this holds. The clear distance should on the one hand take into account a possible projection of the sounder housing and on the other hand facilitate the mounting of the horn on a wall or ceiling.

Furthermore, the distance should be sufficiently small so that reflections of the sound at the parallel to the flat side surface extending wall or ceiling in front of the sound outlet opening are possible only at very shallow angles, so that interfering interference can be prevented.

In one embodiment, the mounting bracket has two parallel aligned, U-shaped bracket for at least partially encompassing the hollow body and the webs connecting the two brackets together. Each of the mutually parallel brackets is used for at least partially gripping the hollow body on its outer side in the vicinity of the sound inlet opening or the sound outlet opening. The web connecting the two parallel-aligned webs extends in an assembled state along the connection between the sound inlet opening and the sound outlet opening.

In one embodiment, each of the U-shaped brackets has two legs, each with a slot and / or a lateral insertion for inserting a respective holding element in the slot, each two holding elements are arranged on the outside of each of two opposite side walls of the funnel-shaped horn. For mounting the sound system, the mounting bracket is first attached to the wall or ceiling to which the sound system is to be mounted. Subsequently, the holding devices of the horn are brought into engagement with the respective slot and / or the respective insertion aid of the mounting bracket, so that the horn is suspended on the U-shaped brackets. The position of the retaining elements in the oblong holes is variable, so that the orientation of the sound system relative to the mounting bracket and the wall or ceiling is adjustable. In one embodiment, the insertion aid is a dovetail-shaped opening which opens laterally into a slot. In particular, mounting the sonicator "overhead", i. on a ceiling and after the mounting bracket has already been mounted on the ceiling, so is simplified.

In one embodiment, the mounting bracket made of metal and / or the sounder is also and independent of the funnel-shaped horn, which is typically made of plastic, releasably connected via a mounting bracket and / or a chain and / or a rope to the mounting bracket. Preferably, the mounting bracket, the chain and / or the rope are fireproof. For example, the mounting bracket, the chain and / or the rope can be made of metal. In this way, even in the event of a fire at the mounting location of the sound system, the sounder is prevented from falling off by the fuse via the mounting bracket, chain and / or cable fastened to the mounting bracket.

Figur 1a:

eine Explosionsansicht einer erfindungsgemäßen Ausführungsform einer Beschallungseinrichtung;

Figur 1b:

eine perspektivische Ansicht auf einen Montagebügel zum in Eingriff bringen mit der Beschallungseinrichtung gemäß Figur 1a;

Figur 1c:

zeigt eine Ansicht auf eine Beschallungseinrichtung gemäß Figur 1a mit einem Montagebügel gemäß Figur 1 b;

Figur 2a:

eine Seitenansicht auf ein Horn einer Beschallungseinrichtung gemäß einer weiteren Ausführungsform der Erfindung;

Figur 2b

eine Rückseitenansicht auf die Schalleintrittsöffnung des Horns gemäß der Figur 2a;

Figur 2c

eine Draufsicht auf die erste, ebene Seitenfläche des Horns aus den Figuren 2a und 2b.

Further advantages, features and applications of the present invention will become apparent from the following description of preferred embodiments and the associated figures. Show it:

FIG. 1a

an exploded view of an embodiment of a public address device according to the invention;

FIG. 1b

a perspective view of a mounting bracket for engaging with the sound system according to FIG. 1a ;

FIG. 1c:

shows a view of a sound system according to FIG. 1a with a mounting bracket according to FIG. 1 b;

FIG. 2a:

a side view of a horn of a public address device according to another embodiment of the invention;

FIG. 2b

a rear view of the sound inlet opening of the horn according to the FIG. 2a ;

Figure 2c

a plan view of the first, planar side surface of the horn from the FIGS. 2a and 2 B ,

The FIG. 1 shows an embodiment of a sound system 1 according to the present invention, wherein the FIG. 1a an exploded view of the sound system 1 without mounting bracket, the Figure 1 b a mounting bracket 10 for engaging with the sound system 1 according to the FIG. 1a and the Figure 1c the sound system 1 from the FIG. 1a with the mounting bracket 10 off Figure 1 b demonstrate.

The sounding device 1 has a horn 4 in the form of a funnel-shaped hollow body with a sound inlet opening 5 and a sound outlet opening 6. A first, planar side surface 4a extends up to the sound exit opening 6 opposite the sound inlet opening 5. Opposite to the first, flat side surface 4a, a second side surface 4b concavely curved outwards from the sound inlet opening 5 to the sound outlet opening 6 connects the sound inlet opening 5 and the sound outlet opening 6th

The cross section of the hollow body is rectangular throughout and widens from the sound inlet opening 5 to the sound outlet opening 6, wherein the sound inlet opening 5 has a circular opening cross-section, but which merges directly into a rectangular cross-section. Specifically, the sound inlet opening 5 is a central, circular opening in a substantially flat flange plate 4e, which is flush with the end of the horn, which has a rectangular cross-section, or integrally connected thereto. The sound outlet opening 6 has a rectangular opening cross-section. The cross-sectional areas of sound inlet to sound outlet behave approximately as 1: 180, wherein the distance between sound inlet to sound outlet in about 20% to 60% greater than the width of the sound outlet, which in turn is about twice the height of this sound outlet.

At or near the sound inlet opening 5, a sound generator 2 is arranged. The sound generator 2 has an opening, behind which a sound-generating membrane is arranged. The opening of the sounder 2 is arranged in alignment with the sound inlet opening 5, wherein the diameter of the opening of the sound generator 2 corresponds to the diameter of the sound inlet opening 5. The projected along the main radiation in a plane perpendicular to this plane surface of the membrane is in the sound inlet opening 5, or covers it. In general, then the symmetry axis of such, typically circular or rotationally symmetric membrane and the main emission direction coincide.

In operation, the sounder 2 converts an electrical signal into an acoustic signal. The acoustic signal is passed through the sound inlet opening 5 in the horn 4. Since the sound generator 2 is arranged directly on the sound inlet opening 5, formed at the sound inlet opening 5 no significant reflections that could worsen the acoustic signal. The guided in the horn 4 acoustic signal propagates in the funnel-shaped hollow body. In order to avoid reflections with the flat side surface 4a of the horn 4 or to limit it to very small angles, the sounder 2 is also arranged immediately adjacent to the flat side surface 4a or an imaginary extension of the same in such a way that its Hauptabstrahlrichtung 3 parallel and low Distance from the flat side surface 4a of the sound inlet opening 5 to the sound outlet opening 6 extends.

In order to protect the sounder 2 from external influences, this is arranged in a housing 9. The housing 9 is sealed with a seal 9a relative to the horn 4, so that the housing 9 is sealed watertight and dustproof.

The sound exit opening 6 has a stiffening bead, i. a circumferential edge reinforcement 6c. The stiffening bead stiffens the sound outlet opening 6 and prevents it from being vibrated in a natural mode during operation. The inner corners 6a of the sound outlet opening 6 have a rounding 6b with a radius of a few millimeters.

To prevent nesting of animals in the sound system 1 is at a maximum distance of 1/3, here at a distance between 1/4 to 1/8 of the length between the sound inlet opening 5 and the sound outlet opening 6 of the sound outlet opening 6 away Grating 7 is arranged. The grille 7 is seated in a grating receptacle, for example in the form of flat grooves or protrusions, which are in the FIG. 1 are not shown, and is screwed with four retractable screws with the flat side surface 4a and the concave side surface 4b of the horn. The center distance between adjacent openings of the grating 7 is constant. In addition, the grating 7 is arranged at an angle of 65 ° to the flat side surface 4a and inclined in the direction of the sound inlet opening 5. The arranged on the flat side surface 4 a edge of the Grating 7 is located farther away from the sound entry opening 5 than the edge of the grating 7 arranged on the concave side surface 4b.

In order to releasably and adjustably connect the sounding device 1 to a mounting bracket 10, the horn 4 has two holding devices 11 on its two opposite sides 4c and 4d. In the present embodiment, the holding devices 11 are wedge-shaped material reinforcements into which a screw or a threaded bolt with a nut can be screwed. Each two holding devices 11 are arranged in at the end of the horn 4 with the sound outlet opening 6 and the end of the horn 4 with the sound inlet opening 5.

The provided for engaging with the holding devices 11 mounting bracket 10 is in the Figure 1 b shown. The mounting bracket 10 has two U-shaped bracket 10 a, which are aligned parallel to each other and are connected to each other via a web 10 b. Each bracket 10a has for the at least partially encompassing of the horn 4 two legs 10c with a slot 10d and an insertion 10e. The screwed into the holding device 11 screw is guided over the insertion 10e in the slot 10d. By moving the screw in the slot 10 d, the position of the horn 4 relative to the mounting bracket 10 can be adjusted. Subsequently, the screws are tightened and connect the legs 10c firmly with the holding devices 11th

In the Figure 1c is the sound system 1 according to the FIG. 1a with a fixed mounting bracket 10 according to the Figure 1 b shown. Clearly recognizable, the web 10b of the mounting bracket 10 extends in the direction of the sound inlet opening 5 to the sound outlet opening 6. The web 10b has a distance from the flat side surface 4a of the horn.

The FIG. 2 shows a horn 4 of another embodiment of a sound system 1 according to the present invention. That in the FIG. 2 shown horn 4 is for in the FIG. 1 Provided sounding device 1 shown, wherein in the FIG. 2a a side view, in the figure 2b is a plan view of the back of the sound inlet opening 5 and in the Figure 2c a plan view of the first, planar side surface 4a of the horn 4 are shown.

In the side view of FIG. 2a is clearly visible that the first, planar side surface 4 a of the horn 4 extends from the sound inlet opening 5 to the sound outlet opening 6 and thus connects the sound inlet opening 5 with the sound outlet opening 6. Opposite to the first, planar side surface 4a, a second, concave side surface 4b of the horn 4 is arranged. The second, concave side surface 4b connects the sound inlet opening 5 with the sound outlet opening 6 and forms together with the two other side surfaces 4c, 4d a funnel-shaped hollow body through which the acoustic signal is passed during operation of the sound system.

The Indian FIG. 2 Sounder 2, not shown, is arranged close to or at the sound inlet opening 5 during operation of the sound reinforcement device. For this purpose, it is provided in this embodiment that the sounder 2 is fixed to the flange 4e of the horn such that the sounder is disposed immediately adjacent to the flat side surface 4a or an imaginary extension of the flat side surface 4a and its Hauptabstrahlrichtung parallel to the first, flat side surface 4a extends from the sound inlet opening 5 to the sound outlet opening 6.

In addition to the attachment of the sounder 2, the flange 4e is also the attachment of a, in the FIG. 2 also not shown, housing 9, which protects the sounder 2 during operation of the sound system from environmental influences.

On the opposite side surfaces 4 d, 4 c are each two holding devices 11 for engaging with a mounting bracket 10, which in the FIG. 2 not shown, arranged. The holding devices 11 are arranged such that in an operation of the sounding device, the web 10b of a mounting bracket 10 is arranged at a distance from the first, planar side surface 4a. Preferably, the distance is selected so that the web 2 in a in the FIG. 2a shown side view at a height with the upper edge of the flange 4e completes.

Surrounding the sound outlet opening 6, the horn 4 has an edge reinforcement 6c, which prevents the horn 4 is set in natural vibration in an operation of the sound system by the sound guided by the horn 4.

The FIG. 2b shows the horn 4 in a plan view of the back of the sound inlet opening 5. The sound inlet opening 5 is a circular opening in the flange 4e. The diameter of the sound inlet opening 5 is preferably selected so that the diameter of a diaphragm of a sounder 2 corresponds, which is arranged in operation of the sound system at or near the sound inlet opening 5. In the FIG. 2a can be clearly seen that the sound inlet opening 5 is arranged in the flange 4e such that the edge of the sound inlet opening 5 is located directly adjacent to the first, flat side surface 4a.

In addition to the FIGS. 2a and 2 B are in the Figure 2c showing a plan view of the first planar side surface 4a, the holding devices 11 mounted on each of the two side surfaces 4c, 4d for engaging with a mounting bracket 10 to recognize. The holding devices 11 are wedge-shaped material reinforcements of the side walls 4c, 4d.

For purposes of the original disclosure, it is to be understood that all such features as will become apparent to those skilled in the art from the present description, drawings, and claims, even if concretely, only in connection with certain others Characteristics have been described, both individually and in any combination with other of the features or feature groups disclosed herein are combinable, unless this has been expressly excluded or technical conditions make such combinations impossible or pointless. On the comprehensive, explicit representation of all conceivable combinations of features is omitted here only for the sake of brevity and readability of the description.

While the invention has been illustrated and described in detail in the drawings and the foregoing description, such illustration and description is exemplary only and is not intended to limit the scope of the protection as defined by the claims. The invention is not limited to the disclosed embodiments.

Variations of the disclosed embodiments will be apparent to those skilled in the art from the drawings, the description and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain features are claimed in different claims does not exclude their combination. Reference signs in the claims are not intended to limit the scope of protection.

LIST OF REFERENCE NUMBERS

1

PA facility

2

sounder

2a

membrane

2 B

Main vibration direction

3

main radiation

4

horn

4a

flat side surface of the horn 4

4b

concave side surface of the horn 4

4c

Side surface of the horn 4

4d

Side surface of the horn 4

4e

Flange plate of the horn 4

5

Sound inlet opening

6

Sound outlet

6a

Corners of the sound outlet opening 6

6b

Rounding the corners 6a of the sound outlet opening. 6

6c

Edge reinforcement of the sound outlet opening. 6

7

grid

8th

perforated sheet

9

casing

9a

poetry

10

mounting bracket

10a

U-shaped bracket of the mounting bracket 10th

10b

Bridge of the mounting bracket 10

10c

Legs of the U-shaped bracket 10a

10d

Slot in the leg 10c

10e

Insertion aid in the leg 10c

11

holder

Claims (15)

A sounding device (1) having a sound generator (2), which has a main emission direction (3), and a horn (4) in the form of a hollow body widening in a funnel shape from a sound inlet opening (5) to a sound exit opening (6), which at least a first, between the openings (5, 6) extending, planar side surface (4a), wherein the sounder (2) is arranged at or near the sound inlet opening (5), characterized in that the sounder (2) immediately adjacent to the plane Side surface (4a) or an imaginary extension thereof is arranged in such a way that its main emission direction (3) parallel to the flat side surface (4a) from the sound inlet opening (5) to the sound outlet opening (6) extends. A sounding device (1) according to claim 1, characterized in that the sound generator (2) has a diaphragm (2a) with a main vibration direction (2b), wherein the main vibration direction (2b) is parallel to the main radiation direction (3). Sonication device (1) according to claim 2, characterized in that the membrane (2a) is circular, wherein preferably the sound inlet opening (5) is circular and the edge of the sound inlet opening (2a) the flat side surface (4a) or an imaginary extension of the flat side surface (4a) tangent. A sounding device (1) according to any one of claims 1 to 3, characterized in that the cross-sectional area of the sound outlet opening (5) and the cross-sectional area of the sound inlet opening (6) has a ratio between, 10: 1 and 500: 1, preferably 50: 1 to 200: 1, more preferably 180: 1, to each other. A sounding device (1) according to any one of claims 1 to 4, characterized in that the opening cross section of the sound outlet opening (6) is rectangular, wherein preferably the inner corners (6a) of the opening cross-section a rounding (6b), preferably with a radius R in a range between 2 mm and 10 mm. A sounding device (1) according to any one of claims 1 to 5, characterized in that a second, the sound inlet opening (5) and the sound outlet opening (6) connecting side surface (4b) of the funnel-shaped hollow body, opposite to the flat side surface (4a) arranged and concave is curved. A sounding device (1) according to any one of claims 1 to 6, characterized in that the distance between the sound inlet opening (5) and the sound outlet opening (6) along the flat side surface (4a) of the funnel-shaped hollow body corresponds to 50 times to 200 times the maximum diameter of the sound inlet opening (5). A sounding device (1) according to any one of claims 1 to 7, characterized in that in the free cross section of the funnel-shaped hollow body, a grid (7) or a perforated plate (8) is arranged, wherein the grid (7) or the perforated plate (8) preferably an angle of inclination between 60 ° and 70 °, preferably 65 °, with respect to the main radiation direction (3), wherein the grid (7) or the perforated plate (8) preferably at a distance of at most 1/3, preferably between 1/4 to 1/8, the length between the sound inlet opening (5) and the sound outlet opening (6) from the sound outlet opening (6) is arranged away. A sounding device (1) according to any one of claims 1 to 8, characterized in that the sound outlet opening (6) has a circumferential edge reinforcement (6c). A sounding device (1) according to any one of claims 1 to 9, characterized in that the sound generator (2) in a housing (9) is arranged, wherein the housing (9) is preferably finished watertight and / or dustproof. A sounding device (1) according to any one of claims 1 to 10, characterized in that a mounting bracket (10) is releasably and adjustably connected to the funnel-shaped hollow body, being mounted on a wall or ceiling parts of the mounting bracket (10) in the assembled state of Hornes (4) have a distance from the flat side surface (4a) of the funnel-shaped hollow body, which is between 1 cm and 10 cm, preferably between 1 cm and 7 cm. A sounding device (1) according to claim 11, characterized in that the mounting bracket (10) has two mutually parallel U-shaped brackets (10a) for at least partially encompassing the hollow body and a U-shaped bracket (10a) interconnecting web (10b) having. A sounding device (1) according to claim 11 or 12, characterized in that each U-shaped bracket (10a) has two legs (10c) each with a slot (10d) and / or an insertion (10e) for engaging with a respective holding device (11) of the funnel-shaped hollow body, wherein each two holding devices (11) on opposite side surfaces (4c, 4d) of the funnel-shaped hollow body are arranged. Sonicating device according to one of claims 11 to 13, characterized in that the mounting bracket (10) is made of metal and / or the sounder (2) with a mounting bracket (12) made of metal with the mounting bracket (10) is detachably connected. Sonicating device according to one of claims 1 to 14, characterized in that the ratio of the length of the horn to width and height of the outlet opening within a tolerance window of 10% 14: 10: 5 (length: width: height) is.

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